Rotatable directive antenna



June 5, 1951 s. A. CARLISLE ROTATABLE DIRECTIVE ANTENNA 2 Shjeets-She et1 Filed Oct. 19, 1949 INVENTOR. BYRON A. CARLISLE BY FIGURE 2.

June' 5, 1951 B. A. CARLISLE ROTATABLE DIRECTIVE ANTENNA 2 Sheets-Sheet2 Filed 001;) 19, 1949 FIGURE 3.

FIGURE 4.

FIGURE 5.

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Patented June 5, 1951 UNITED STATES PATENT O'FFMIE ROTATABLE DIRECTIVEANTENNA Byron A. Carli sle, Shawnee, Kans. Application October 19, 1949,Serial No. 122,250

12 Claims.

This invention relates to an improvement in directive antennas and moreparticularly to cir cumventing obstacles for scanning, receiving andbroadcasting electrical waves.

Heretofore it has been necessary to provide antennas on various sides ofa broadcasting tower to face different directions without interferencefrom the tower members, or a revolving type antenna had to be mounted ontop of a tower and was limited to this location.

It is desirable in many installations, especially tall towers, to havethe antenna mounted on the side of the broadcasting tower in a selectedposition that may be only half way up the tower,

therefore, it is obvious that a single antenna must face all directionsand avoid the interference of the tower members in broadcasting orreceiving electrical waves.

An object of the .improved invention is to mount an elongated member onthe side of a tower whether the tower be round or square, triangular orof many sides such as hexagon, octagon and ,etc., provide an antennanear the free end of the elongated member and have suitable automaticmeans to turn the antenna more degrees on its fulcrum than the elongatedmember turns in degrees on its fulcrum.

With the above object in view the invention will be better understood bythe description that follows and the accompanying drawings of which:

Figure 1 is a view in cross section of a tower illustrated with theimproved elongated or horizontal member fulcrumed'on :the tower andhaving its free end supporting a revolvable reflector type antenna takenon line I-! of Figure 3.

Figure 2 is a view of a longitudinal section of the elongated orhorizontal member taken on line .2-2 of Figure 3, illustrating thesheaves and cable control for revolving the antenna.

Figure 3 is a view of an elevation of the iming .the elongated orhorizontal member in a horizontal sweeping position.

Figure 5 is a fragmentary View taken on line 5-5 of Figure 3illustrating .the limit switch controls for reversing the movementof theelongated or horizontal member.

Figure 6 ma diagrammatic view illustrating the wiring of the motordrive, to the horizontal arm, with reversible "limit switches and amanual three pole fswitch connected in the electrical The elongated orhorizontal member 1 is preferably made in the form of a case or housinghaving enclosed walls 8 and screw cover 9 held to the housing by screwsH1. The screw cover 9 has a boss ll near the sweeping end of thehorizontal member I and supports the frame member l2, electric motor 13,gears l4 and i5 and reflector antenna 44 mounted on its control housingHi. It is obvious that common and well known transmission wires may beconnected to the motor I3 and rotate the gears l4 and [5 to elevate orlower the angle of inclination of the reflector antenna 44. A shaft llextending from frame l2 passes through the boss I I into the case I and8 to support a sheave [8. This sheave i8 is secured on the shaft l1 nearthe free end IQ of the case 1 with walls 8 and is provided with anendless cable passing over the sheave l8 and being anchored at 2|. Theendless cable 20 is crossed at 22 and extends over the sheave 23,anchored at 24, the anchors being any well known clamp means to preventthe cable from shifting on the sheave 23. The sheave 23 is fixedlysecured to the stationary tube 25 by set screw 26, the tube 25 having abase 2.! secured to the tower frame member 28. The tube 25 extendsupward into a mast tube 29 and forms a fulcrum or journal for the masttube 29 to rotate thereon. The top of the mast tube 29 is fulcrumed at30 on the plate 3| of the tower 32 and has a bearing collar 33 pinnedthereto by pin 34. A brace 35 is used with heavy equipment asillustrated and extends from the mast tube 29 to the screw cover plate 9for additional support.

A shaft 36 extends from the coupling 31 through tower frame member 28,tube 25, mast tube 29 and is relatively fixed with mast tube 29 by meansof the collar 33 and pin 34.

The coupling 31 is also connected to the shaft 38 which is driven bygears 39 and 40 and pinions 4! and 42. The pinion 42 is mounted on theelectric motor 43 and the gears are journalled in the casing 45 all ofwhich constitutes a common and well known motor gear reduction drive.The motor gear reduction housing 45 is mounted on the longitudinalmember 45 of the tower 32 and limit switch arms 41 and 48 are clamped ormounted on the mast tube 29. The limit switch arms 41 and 48 haveadjustable actuating screws 49 and 5D to operate common and Well knowntype of limit switches 5i and 52 respectively.

In Figure 6 the diagrammatically illustrated motor 43 has three phasewires extending therefrom, wires 53 and 54 extend to limit reversing 3switch 5! and wire 55 extends to a three pole switch 56. Wires 5'! and53 extend to the limit and reversing switch 52 and wires 59 and 6Gcomplete the three phase .circuit to the three pole throw switch 56.

In the operation it will be apparent from the foregoing description thatwhen current is passed through the three phase circuit the motor 53 willrevolve and drive the gears in the housing 45 to shaft 36. The shaft 38passes through base 21 of stationary tube 25 and through pivoted masttube 29, driving the collar 33 through the pin 34 thus moving the brace35 and mast tube 29 in a rotative direction. The arm I will fulcrum onfixed tube 25 and have its free end 19 sweep from one side of the towerto the opposite side of the tower or as illustrated 180 degrees. Thelimit switch arms 4'! and 48 will turn with the mast tube 29 and eitherthe actuating screw 49 or 56 Will strike their respective limit switches5| and 52 causing a reversing action of the motor and reversing movementof the arm E as disclosed by the wiring in Figure 6.

The sheave 23 is anchored on the fixed tube 25 and has the flexiblecable anchored at 24. When the arm 1 with its case B and free end itsweeps in an arc the sheave 18 will be turned by the cable 20 andanchorage 2|. When the free end is is on one side of the tower thereflector antenna 44 faces one direction and as the arm sweeps to theopposite side of the tower the reflector antenna M5 is rotated on theshaft I-I through 360 degrees. Using a square tower the reflectorantenna M faces the same direction as it did on the opposite side of thetower.

It is obvious from the illustrated drawings and description that thereflector antenna may be revolved as the horizontal member i sweeps fromside to side of the tower in what is known as continuous scamiing or thereflector antenna may be stopped in any position between the limit ofthe movement thereof by throwing out the a three pole switch 56.

The reflector type antenna is also fixed on shaft 6| to rotate therewithby means of the gears l4 and i5 and motor [3 to move the reflectorantenna 4 1 upward in a selective angular plane or downward in aselective angular plane. The wiring controls and minute details are notillustrated because of the well known art thereof.

What I claim as new and desire to secure by Letters Patent is:

l. A directive antenna comprising, a revolvable antenna, a'longitudinalmember, said revolvable antenna being supported near the free end ofsaid longitudinal member, the opposite end of said longitudinal memberbeing fulcrumed' on a stationary member, a drive member being connectedto said longitudinal member to move the free end of said longitudinalmember in an arc, and control members extending from said stationarymember to said revolvable antenna to cause it to rotate more degrees or"movement about its axis than the degrees of movement said longitudinalmember rotates about its axis.

2. A directive antenna comprising a fulcrumed antenna reflector, anelongated member supporting said fulcrumed antenna reflector, saidelongated member being fulcrumed on a stationary member, a drive memberbeing connected to said elongated member to move it in an arc, andconnecting members extending from the fulcrum of said' elongated memberto said fulcrumed'antenna reflector to cause said fulcrumed antennareflector to rotate more degrees of move- 4 ment with respect to itsaxis than the degrees of movement of said elongated member with respectto its axis.

3. A directive antenna comprising, a revolvable antenna, a controlmember supporting said revolvable antenna, a horizontal member, saidcontrol member being supported by the free end of said horizontalmember, the opposite end of said horizontal member being rotatablypivoted on a stationary shaft, said stationary shaft having supportingmeans, a revolvable member being connected to said horizontal member tomove the free end of said horizontal member in an arc, and controlmembers extending from the pivot of said horizontal member to said firstmentioned control member to cause said antenna to rotate twice as manydegrees of movement with respect to its axis than the degrees ofmovement of said horizontal member with respect to its axis.

4. A directive antenna comprising, a revolvable antenna, a horizontalmember, said revolvable antenna being supported near'the free end ofsaid horizontal member, the opposite end of said horizontal member beingfulcrumed on a stationary member, a drive member being connected to saidhorizontal member to move the free end of said horizontal member in anarc, control members at each end of said are to cause said drive memberon said horizontal member to reverse the movement thereof, and controlmembers extending from said stationary member to said revolvable antennato cause it to rotate more degrees of movement than the degrees ofmovement of said horizontal member each about their respective axes.

5. A directive antenna comprising, a revolvable antenna reflector, ahorizontal member, said revolvable antenna reflector being supportednear the free end of said horizontal member, the opposite end of saidhorizontal member being rotatably pivoted on a stationary member,a drivemember being connected to saidhorizontal member to move the free end ofsaid horizontal member in an arc, control members at each end of saidare co-operating with said horizontal member to reverse the movementthereof, and control members extending from said pivot to saidrevolvable antenna reflector to cause said reflector to rotate moredegrees of movement with respect to its axis than the degrees or"movement of said horizontal member with respect to its axis. 6. Adirective antenna comprising, a revolvable antenna, a control membersupporting said revolvable antenna, a horizontal member, said controlmember mounted near the free end of said horizontal member, the oppositeend of said horizontal member being rotatably pivoted on a stationaryshaft, saidstationary shaft havin supporting means, a revolvable memberbeing connected to said horizontal member to move the free end of saidhorizontal member in an arc, and control members extending from saidpivot to said first mentioned control member to cause said antenna torotate more degrees of movement with respect to its axis than thedegrees of movement of said horizontal member with respect to its axis.

'7. A directive antenna comprising, a fulcrumed concave reflector, acontrol member supporting said concave reflector in. a selective angularplane with respect to a horizontal plane, a horizontal member, saidcontrol member supported by the free end of said horizontal member, theopposite end of said horizontal member being rotatably pivoted on astationary vertical shaft, said vertical shaft having supporting means,a revolvable member being connected to said horizontal member to movethe free end of said horizontal member in an arc, and control membersextending from the pivot of said horizontal member to said firstmentioned control member to cause said concave reflector to rotate in agreater are with respect to its fulcrum than the arc of said horizontalmember rotates on its fulcrum.

8.'A directive antenna comprising, a fulcrumed concave reflector, acontrol member supporting said concave reflector in a selective angularplane with respect to a horizontal plane, an elongated member, saidcontrol member attached to the free end of said elongated memher, theopposite end of said elongated member being rotatably pivoted on astationary vertical shaft, said vertical shaft having supporting means,a revolvable member being connected to said elongated member to move thefree end of said elongated member in an arc, limit control members ateach end of said arc to cause said elongated member to reverse themovement thereof, and control members extending from the pivot of saidelongated member to said first mentioned control member to cause saidconcave reflector to rotate in a greater are with respect to its fulcrumthan the arc of said elongated member rotates on its fulcrum.

9. A directive antenna comprising, a fol-- crumed concave reflector, acontrol member supporting said concave reflector in a selective angularplane with respect to a horizontal plane,

a horizontal member, said control member being 35 supported near thefree end of said horizontal member, the opposite end of said horizontalmember being rotatably pivoted on a stationary member, a revolvablemember being connected to said horizontal member to move the free end ofsaid horizontal member in an arc, limit control members at each end ofsaid are to cause said horizontal member to reverse the movementthereof, and control members extending from the horizontal memberfulcrum to said first mentioned control member to cause said concavereflector to rotate in a greater are with respect to its fulcrum thanthe arc of said horizontal member rotates on its fulcrum.

10. A directive antenna comprising, a revolv: l

able antenna, an elongated member, said revolvable antenna attached tothe free end of said elongated member, the opposite end of saidelongated member being fulcrumed on a stationary shaft, said stationaryshaft having a supporting means, a member being connected to saidelongated member to move the free end of said elongated member in anarc, limit control members at each end of said are to cause saidrevolvable member on said elongated member to reverse the movementthereof, and control members extending from said stationary shaft tosaid revolvable antenna to cause it to rotate more degrees of movementthan the degrees of movement of said elongated member each about theirrespective axes.

11. A directive antenna comprising, a revolvable antenna, an elongatedmember, said revolvable antenna attached to the free end of saidelongated member, the opposite end of said elongated member beingrotatably pivoted on a stationary shaft, said stationary shaft havingsupporting means, a revolvable member being connected to said elongatedmember to move the free end of said elongated member in an arc, limitcontrol members at each end of said are to cause said elongated memberto reverse the movement thereof, and control members extending from saidpivot to said revolvable antenna to cause said antenna to rotate moredegrees of movement with respect to its axis than the degrees ofmovement of said elongated memher with respect to its axis.

12. A directive antenna comprising, a revolvable antenna, a controlmember supporting said revolvable antenna, a horizontal member, saidcontrol member supported near the free end of said horizontal member,the opposite end of said horizontal member being rotatably pivoted on astationary shaft, said stationary shaft having supporting means, arevolvable member being connected to said horizontal member to move thefree end of said horizontal member in an arc, limit control members ateach end of said are to cause said revolvable member on said horizontalmember to reverse the movement thereof, and control members extendingfrom said pivot to said first mentioned control member to cause saidantenna to rotate more degrees of movement with respect to its axis thanthe degrees of movement of said horizontal member with respect to itsaxis.

BYRON A. CARLISLE.

No references cited.

